311results about "Line-faulsts/interference reduction" patented technology

The invention relates to the technical field of anti-interference, in particular to a communication signal interference elimination method and system, and the method comprises the following steps: obtaining communication signal time domain data, calculating a signal energy change rate, a signal abrupt change rate and a phase drift rate, marking and distinguishing a signal region according to a calculation result, and obtaining a communication signal non-stationary interval identification result. According to the method, the time domain data of the communication signal is subjected to fine-grained calculation, and the signal energy change rate, the signal abrupt change rate and the phase drift rate are extracted, so that accurate signal region distinguishing is realized, the regression modeling parameter range is adjusted, the influence of instantaneous data of an abrupt change region is reduced, and the stability of signal reconstruction is improved; according to the method, signal-to-noise ratio calculation and interference power fluctuation amplitude evaluation are combined, channel state parameters are dynamically adjusted, interference intensity evaluation is more accurate, the filtering step length, the weight coefficient and the gain coefficient are optimized based on error information, signal processing adapts to different types of interference, and integrity and stability of communication signals are enhanced.

The invention discloses a wireless emergency communication transmission method and system for environmental signal strong interference, and relates to the technical field of wireless communication interference prevention, and the method comprises the steps: recognizing the type of an interference source when wireless emergency communication is interfered; constructing a corresponding game model based on the interference source type; in the game model, selecting an error rate as a utility function, and evaluating the effect of each anti-interference strategy based on the utility function; obtaining an anti-interference communication technology and a corresponding anti-interference strategy; an optimal anti-interference strategy is obtained by solving an equilibrium solution of the game model; the anti-interference strategy is optimized and adjusted in real time based on the real-time change of the communication requirement and the interference environment. By arranging the interference type identification module, the game model construction module, the equilibrium solution solving module and the strategy real-time optimization module, power strategy selection of the user is analyzed from the perspective of non-cooperative and cooperative games, and the performance level of wireless communication of the user is improved.

The invention relates to the technical field of high-frequency multichannel synchronous transmission, in particular to a time domain reflection compensation design method for high-frequency signal transmission loss, which comprises the following steps of: 1, responding to a synchronous trigger signal to generate an active reflection reference signal with a determined time domain position; 2, aligning time marks between channels through cross-correlation operation; 3, extracting a reflection feature template of the channel from the alignment signal, and recognizing and eliminating crosstalk components through convolution operation with an adjacent channel template; 4, constructing a time-varying transfer function model according to the amplitude envelope attenuation characteristic and the carrier phase jump characteristic of the reflection characteristic template; and 5, generating a compensation filter based on the time-varying transfer function model, and verifying the compensation effect through secondary reflection. Through cross-correlation operation, accurate alignment of multi-channel signal time scales is realized, the time delay difference between different transmission channels is overcome, signal synchronization of each channel is ensured, and the beam forming precision is improved.

A communication interface circuit supporting a communication link change and a method of operating the same, the communication interface circuit including: a protocol layer circuit generating packet data based on input data; and a physical layer circuit that encodes the packet data to output a transmission state, and drives a data channel including a plurality of three-phase line links based on the transmission state, where the physical layer circuit may include an encoder that encodes the packet data to output the transmission state. The encoder calculates a transmission state based on a preorder state output from the encoder within a previous unit interval, a symbol mapped to the packet data, and a control code, and wherein the control code indicates a coding change based on a coupling relationship of the plurality of three-phase line links. A communication interface circuit stably transmits data.

The invention provides an unmanned aerial vehicle dual-polarized antenna multipath interference suppression and polarization mismatch joint optimization algorithm, and relates to the technical field of low-altitude communication, and the algorithm carries out the coupling modeling of a multipath interference problem and a polarization mismatch problem through building a unified dual-polarized channel model which considers multipath propagation and time-varying polarization characteristics; an adaptive polarization state estimation method based on received signal covariance matrix feature analysis is provided; a combined space-time-polarization domain adaptive filter structure is designed; a joint optimization objective function containing a minimum mean square error and a maximum polarization matching degree (MPM) is constructed; a low-complexity adaptive weight updating rule based on a recursive least square (RLS) thought and integrated with polarization constraints is deduced. According to the algorithm, interference suppression and polarization matching are collaboratively optimized through a unified framework, the complexity is reduced by adopting recursive calculation, rapid convergence and strong environmental adaptability are realized, and the low-altitude communication performance of the unmanned aerial vehicle is remarkably improved.

A communications circuit includes transmitter circuitry for driving a differential signal on two die terminal. The transmitter circuitry includes two drive transistors who conductivity is controlled to provide a path from a common node to each of the die terminals. A string of one or more diodes is coupled to the common node to provide a path for discharging ESD current from the common node from an ESD event affecting either die terminal.

The invention discloses a high-integration intelligent ignition head device and an automobile safety communication power supply system thereof. The device comprises an input unit, a power management module, a communication module, a communication judgment module, an MCU, a voltage sensing module, a current sensing module, an ignition control module, an ignition element and a substrate, and an environment self-adaption unit, a dual-mode wireless energy supply unit and an optical fiber diagnosis channel can be additionally arranged. The system adopts the device, communicates with a central control unit through a redundant optical fiber bus and a double-wire bus, and further comprises the central control unit, a dynamic topology reconstruction unit and a pre-ignition energy distribution unit. Through digital signal control, multi-dimensional sensing module integration and a double-wire bus topological structure, ignition threshold multi-stage protection, state real-time monitoring and feedback, multi-ignition-head parallel independent control and miniaturized function integration are achieved, and the reliability, the intelligent degree and the driving efficiency of an automobile safety system are improved.

The invention relates to the technical field of wireless communication, in particular to a super-Nyquist signal iterative interference elimination method based on symbol grouping and FEC (Forward Error Correction), which comprises the following steps of: acquiring bit streams, grouping symbols according to odd-even positions and encoding, and respectively generating and superposing odd-even sub-signals to generate FTN (Feeder Transfer Network) signals; performing matched filtering and sequence detection, and extracting soft information of odd and even positions; performing soft decoding on the soft information at the odd positions to generate Nyquist odd group signals; subtracting the odd-numbered group signals from the total signal of the receiving end to obtain even-numbered group feedback signals; performing matched filtering and soft decoding to obtain an even number position judgment bit, and regenerating an even number signal; and extracting an odd feedback signal by subtracting the total signal of the receiving end from the even regeneration signal, generating an odd decision based on Nyquist matched filtering and soft decoding, and performing loop iteration until ISI is completely eliminated. According to the invention, efficient and robust suppression of ISI in the FTN system can be realized, and the method can adapt to the dynamic change of an optical fiber channel.

The invention discloses a communication system signal receiving method, circuit, device and equipment based on a memristor, and belongs to the field of integrated circuits and the field of communication signal processing. According to the communication system signal receiving method provided by the invention, element values of a real number field channel matrix and a variance value of a noise signal vector are mapped into a conductivity value of a memristor, a real number field receiving signal vector is mapped into a voltage signal vector, the voltage signal vector is input into an analog domain calculation circuit, the output of the circuit is measured, and detection of all emission signal components is realized. The communication system signal receiving circuit, device and equipment are realized based on the method. Compared with a traditional processor based on digital domain calculation, the analog domain calculation circuit based on the memristor, which is realized by aiming at a serial interference elimination detection algorithm, is shorter in calculation delay and higher in energy efficiency, and compared with an existing linear detection algorithm circuit based on the memristor, the analog domain calculation circuit based on the memristor has the advantages of better detection performance and lower bit error rate.

Joint denoising and compression of channel state information (CSI) feedback may be performed. An example device may include a processor configured to perform one or more actions. The device may receive configuration information that indicates a latent mode of operation and an encoder model. The device may receive CSI reference signals from a network node. The device may generate an estimated channel matrix based on the CSI reference signals. The device may generate a latent representation of the estimated channel matrix based on the latent mode of operation and the encoder model. The device may send the latent representation of the estimated channel matrix to the network node.

The utility model provides a signal processing circuit, electronic equipment and a communication system, and relates to the technical field of communication. The signal processing circuit comprises a differential conversion module, a synthesis module and a decoding module, the differential conversion module is connected with the synthesis module, and the synthesis module is further connected with the decoding module through a pair of differential signal lines. The differential conversion module is used for respectively converting the plurality of original signals into a plurality of original differential signal pairs and sending the original differential signal pairs to the synthesis module; wherein the amplitudes of the original differential signal pairs are the same. The synthesis module is used for converting the plurality of original differential signal pairs into a plurality of differential signal pairs with different amplitudes, and synthesizing the plurality of differential signal pairs into a composite differential signal pair. And the decoding module is used for decoding one composite differential signal pair into a plurality of original signals and sending the original signals to a signal receiving end. According to the signal processing circuit, the electronic equipment and the communication system, the number of signal lines can be reduced, and the cost is reduced.

A first communication apparatus sends a first communication frame to a second communication apparatus, where the first communication frame is used for channel quality measurement. The first communication apparatus receives a second communication frame from the second communication apparatus, where the second communication frame includes first indication information that indicates at least one frequency band whose power spectrum density is to be increased in a robust communication frame, or the first indication information indicates channel quality of at least one frequency band in a robust communication frame.

The invention relates to a communication crosstalk suppression method and a communication system, and the method comprises the steps: firstly obtaining the communication state data of a target network during the communication crosstalk suppression, and judging whether there is crosstalk between the target network and other networks or not according to the communication state data. And under the condition that crosstalk exists between the target network and other networks, adjusting a communication signal of the target network according to the first signal adjustment mode, and synchronously obtaining a communication quality parameter after signal adjustment. And if the adjusted communication quality parameter of the communication signal does not meet the preset communication condition, adjusting the communication signal according to a second signal adjustment mode. Wherein the first signal adjusting mode and the second signal adjusting mode are different adjusting modes. According to the communication crosstalk suppression method, the signal adjustment mode can be flexibly selected according to the communication quality parameter and the preset communication quality condition, the quality of the communication signal during communication transmission is improved on the premise of ensuring reliable data transmission, and the transmission rate of the communication signal is improved.

The invention discloses a receiving and transmitting integrated detection system based on a CMUT sensor. The system comprises a DC bias voltage supply module, a CMUT detection module, a CMUT detection module, a CMUT detection module and a CMUT detection module, the system power supply module is used for supplying power; the PC upper computer end is used for generating upper computer data; the data communication module is used for transmitting data of the upper computer; the FPGA gating signal control module is used for receiving data of the upper computer and processing and distributing the data; the high-voltage pulse circuit generation module is used for selectively starting corresponding n paths of high-voltage pulse excitation signals according to the gating signal; the time division multiplexing circuit module is used for expanding n paths of high-voltage pulse excitation signals to 2n paths of high-voltage pulse excitation signals; the LC impedance matching module is matched with a specific transducer; an echo signal amplification module for secondary amplification; and the analog-to-digital conversion module is used for quantifying the echo data after secondary amplification. According to the invention, multi-channel synchronous driving of the array CMUT sensor can be realized, mutual crosstalk between different channels can be suppressed, and delay caused by different path lengths can be suppressed.

The invention relates to a dual dynamic optimization multi-user detection method based on SCMA in an uplink NOMA system, and belongs to the technical field of wireless communication. According to the method, the technical problems of insufficient multi-user interference suppression caused by codebook cross correlation enhancement in a high overload scene, poor convergence stability of a traditional detection algorithm and error code propagation caused by a hard decision mechanism are solved. The scheme of the invention comprises the following steps of: generating a dynamic codebook: constructing a low-mutual-interference codebook through resource load balancing and complex field amplitude phase joint optimization; dual confidence interference elimination: fusing user-level weight and symbol-level weight to dynamically adjust elimination intensity; according to the cross-layer iteration mechanism, soft information closed-loop feedback is achieved in combination with interference suppression merging equalization and hierarchical decoding; and dynamic damping updating: adaptively adjusting the soft information feedback intensity based on the signal-to-noise ratio to suppress oscillation. The method has the beneficial effects that the multi-user interference suppression capability is improved in a breakthrough manner, the interference elimination precision is revolutionarily optimized, and the system keeps ultrahigh reliability in a severe environment with a low signal-to-noise ratio.

The invention discloses an environmental interference suppression method and system applied to a multi-source repeater signal, relates to the technical field of signal interference, and comprises the following steps: configuring basic parameters of a target repeater according to base station information, avoiding conflicts with conditions of surrounding base stations during subsequent environmental interference suppression and gain, providing a basis for subsequent suppression, and improving the interference suppression efficiency. And safe operation of peripheral base stations is ensured. A terrain interference index and a boundary range between different terrain types are defined, a reliable basis is provided for interference evaluation, and the description precision of an interference model is improved. Regional classification is carried out on interference conditions in a coverage range of a target repeater through a terrain interference model, an environment interference suppression strategy is set for each level of region, and evaluation and feedback adjustment are carried out on the environment interference suppression strategy by virtue of a suppression effect parameter table, so that closed-loop adjustment and feedback of suppression measurement are realized; the signal propagation effect is improved, and the adaptability and reliability of environmental interference suppression are ensured.

Examples described herein include systems and methods which include wireless devices and systems with examples of full duplex compensation with a self-interference noise calculator. The self-interference noise calculator may be coupled to antennas of a wireless device and configured to generate adjusted signals that compensate self-interference. The self-interference noise calculator may include a network of processing elements configured to combine transmission signals into sets of intermediate results. Each set of intermediate results may be summed in the self-interference noise calculator to generate a corresponding adjusted signal. The adjusted signal is received by a corresponding wireless receiver to compensate for the self-interference noise generated by a wireless transmitter transmitting on the same frequency band as the wireless receiver is receiving.

The invention relates to the technical field of compressed sensing, and particularly discloses a sparse adaptive system identification method and system based on inverse QR decomposition, and the method comprises the steps: a receiving signal obtaining step: transmitting a transmitting signal to a detected target, and then obtaining a receiving signal, the receiving signal comprises a direct coupling interference signal and a target signal; an estimation signal obtaining step of obtaining an estimation signal corresponding to the transmitting signal based on the transmitting signal through an adaptive filtering model based on inverse QR decomposition; and an identification step: eliminating the direct coupling interference signal through the estimation signal to obtain the target signal.

The invention discloses a holographic electromagnetic wave signal transmission method and system based on a mine shaft, and relates to the technical field of signal transmission, and the method comprises the steps: obtaining mine shaft environment parameters and holographic electromagnetic wave signal basic setting parameters, carrying out the multipath propagation analysis based on the mine shaft environment parameters, and obtaining the multipath propagation characteristic data; performing signal delay spread simulation analysis on the multipath propagation characteristic data to obtain signal delay spread data, and performing inter-symbol interference association mining based on the signal delay spread data to obtain inter-symbol interference association data; signal modulation optimization design is carried out according to the intersymbol interference associated data, signal modulation optimization data are generated, holographic electromagnetic wave signal transmission planning is carried out through the signal modulation optimization data, holographic electromagnetic wave signal transmission planning data are obtained, and then signal transmission operation in the mine shaft is guided according to the holographic electromagnetic wave signal transmission planning data. The method has the effect of improving the holographic electromagnetic wave signal transmission efficiency.

This application discloses a signal reconstruction method, apparatus, electronic device, storage medium, and product. The method includes: acquiring a mixed signal to be processed; performing M-level wavelet decomposition on the mixed signal based on orthogonal wavelets to generate M high-frequency components and one low-frequency component; determining an adaptive filtering threshold corresponding to each high-frequency component, and performing hierarchical threshold filtering on the high-frequency components based on the adaptive filtering threshold to generate corresponding high-frequency target components; determining a hard filtering threshold corresponding to the low-frequency component, and performing threshold filtering on the low-frequency components based on the hard filtering threshold to generate corresponding low-frequency target components; and reconstructing the M high-frequency target components and the low-frequency target component to generate a target signal. This solution can remove ultra-low frequency drift signals from the mixed signal while also performing hierarchical threshold filtering to remove high-frequency noise from the mixed signal, significantly improving the algorithm's tracking ability and anti-interference performance for non-stationary signals.

An adaptive common-mode dimmer (104a; 108a) having a first low quiescent current operating mode and a second high quiescent current operating mode; wherein: the common mode dimmer (104a; 108a) is configured to: coupling to a two-wire transmission line (110); and Maintaining a common mode voltage (Vcm) thereon at a desired common mode reference voltage (Vmid); the two-wire transmission line (110) is configured to transmit differential signals; the common-mode dimmer (104a; 108a) is configured to operate in the first mode when the common-mode voltage (Vcm) on the two-wire transmission line (110) is between a high common-mode reference voltage (Vhi) and a low common-mode reference voltage (Vlo); and the common mode dimmer (104a; 108a) is configured to otherwise operate in the second mode.

The invention relates to the technical field of industrial control system physical layer state monitoring, and discloses an electromagnetic shielding effectiveness control system of a communication equipment connector, which comprises a protocol time sequence synchronization module, an idle noise acquisition module, a state identification and processing module and a decision and interface module, and after determining that continuous noise drift exists, the state identification and processing module firstly suppresses alarm output, communicates with other similar systems in a neighborhood so as to judge cooperative drift, and only releases suppression and outputs an alarm when determining that non-cooperative drift exists. An originally isolated single-point decision which may generate misjudgment due to global environment fluctuation is converted into a system-level diagnosis conclusion which is based on distributed consensus and can clearly distinguish local failure of the connector from global environment change, and the accuracy and reliability of state evaluation of the industrial control system in a complex electromagnetic environment are improved.

The application relates to the technical field of smart grids, in particular to a power line background noise identification method and device based on G3-PLC communication, which comprises the following steps: acquiring signal-to-noise ratio time sequence data of G3-PLC communication subcarriers, calculating background noise characteristic values according to the signal-to-noise ratio time sequence data, constructing a background noise feature vector according to the background noise characteristic values, performing clustering analysis on the background noise feature vector by using a K-Means algorithm, forming a noise mode cluster set with physical significance, and then mapping each cluster obtained by clustering into a power line background noise type based on a preset noise type mapping rule, so that the accuracy and reliability of power line background noise identification are significantly improved, and the method is suitable for actual power grid operation environments.

The invention discloses a signal transmission method based on complex signal shielding, and the method comprises the steps: enabling a cooperation party to generate a ZC sequence according to a preset root index and a sequence length in a generation rule, and enabling the ZC sequence to serve as a shielding signal; a legal sender obtains a to-be-transmitted original signal, performs importance evaluation on the signal, and performs hierarchical encryption on the signal according to an evaluation result and an encryption protocol pre-agreed with a legal receiver to obtain a first type of signal; the legal sender superposes the first type of signal and the shield signal in a time-frequency domain to generate a transmission signal and sends the transmission signal; and the legal receiver generates a local ZC sequence copy by using the generation rule, and performs channel estimation and interference elimination on a transmission signal by using the ZC sequence copy to obtain an original signal. Through key technologies such as synchronous generation and accurate matching of the ZC sequence, signal hierarchical encryption and time-frequency domain superposition, the security, concealment and reliability of signal transmission are improved, and the urgent demand of the modern communication field for efficient and safe signal transmission is met.

Communications method and apparatus include encoding information into a high-peakedness designed pulse train, converting the designed pulse train into a low-peakedness signal suitable for modulating a narrowband carrier to generate a physical communication signal with desired spectral and temporal properties, and generating and transmitting the physical communication signal. The communications method and apparatus also include receiving and demodulating the physical communication signal, and further converting the demodulated signal into a high-peakedness received pulse train corresponding to the designed pulse train, so that the encoded information may be extracted from the received pulse train.

The invention relates to an interference elimination method and device and computer equipment. The method comprises the following steps: receiving an initial time domain signal on a time-frequency resource of a serving cell; wherein the initial time domain signal is a superposed signal of a first physical broadcast channel (PBCH) signal from a serving cell and a second PBCH signal from a same-frequency interference cell of the serving cell; pBCH decoding is carried out on the initial time domain signal to obtain first cell information; wherein the first cell information comprises a target synchronization signal of the first cell and PBCH block SSB center frequency point information; determining the first cell as a same-frequency interference cell according to the cell center frequency point information and the target SSB center frequency point information, and performing same-frequency interference elimination on the initial time domain signal according to the cell center frequency point information; wherein the cell center frequency point information comprises the actual SSB center frequency point information of the service cell and the actual SSB center frequency point information of the same-frequency interference cell. The method can effectively eliminate the same frequency interference and improve the communication quality.

The invention provides a signal modulation method, a decision feedback equalizer and a storage medium. The method comprises the following steps: performing amplitude estimation on a modulation signal x (t) to obtain an amplitude estimation value a (t) of a current period; the amplitude estimation values a (t-1), a (t-2),..., a (t-M + 1) and the amplitude estimation value a (t) in the past M-1 periods are balanced, an amplitude balance result z (t) is obtained, and M is an integer larger than 1; the differential phase p (t-i) of the modulation signal x (t) is determined, the differential phase p (t-i) is a differential phase result of x (t) and x (t-i), and i is an integer larger than 0; balancing the differential phases p (t-1), p (t-2),..., p (t-N + 1) in the past N-1 periods to obtain an actual differential phase w (t), N being an integer greater than 1; recovering the actual differential phase w (t) to a normal signal phase v (t); and demodulating to obtain a modulation result y (t) corresponding to the modulation signal x (t) according to the amplitude equalization result z (t) and the signal phase v (t). According to the signal modulation method provided by the invention, the equalization performance of the decision feedback equalizer can be improved.

This invention provides an FPGA-based encoding method for single-core cable logging, comprising: detecting whether the edge of the original transmitted signal changes; if the edge of the original transmitted signal changes, encoding the original transmitted signal using two pulse signals to obtain a final output signal in which positive and negative levels cancel each other out. This invention uses an FPGA module and an external driving circuit in synergy to encode the original transmitted signal, resulting in a final output signal in which positive and negative levels cancel each other out. This invention effectively avoids baseline drift-induced glitches that interfere with the signal and affect data accuracy, thus solving the problem of level fluctuations affecting the signal in single-core cable transmission for oil logging.

The present invention relates to a composite differential frame synchronization algorithm for burst communication under high dynamic conditions. The algorithm comprises the following steps: Step 1: differentially processing the received signal. In high dynamic scenarios, differential processing is required to reduce the influence of frequency deviation and obtain a differential sequence; Step 2: processing multiple groups of differential sequences in parallel, repeating Step 1, wherein each differential process differs in that the delay period of the differential is different, i.e., obtaining multiple groups of differential sequences with different delay periods; then sliding the phase of each group of differential sequences, and using the maximum value as the cross-correlation value of the differential sequence after passing through a filter, etc. The method of the present invention has the following advantages: it is easy to implement in hardware, has low complexity, can quickly obtain frame synchronization results, and can then quickly demodulate the signal to obtain information. It is suitable for burst signals, has real-time performance, and has wide application value in military battlefields.

A transmitting module (121; 121_0) and a method for transmitting differential signals in a serial bus system (1) are provided. The transmitter module (121; 121_0) has a first to fourth transmitter stage (121A, 121B, 121C, 121D) connected in a full bridge, in which the first and fourth transmitter stages (121A, 121D) are connected in series and the third and second transmitter stages (121C, 121B) are connected in series, and a current limiting circuit (1210; 1210_0) for measuring and evaluating currents (I_S1, I_GND) through a first and second leakage resistor (1211, 1212) connected to the full bridge, wherein the first to fourth transmitter stages (121A, 121B, 121C, 121D) are used to generate differential bus signals (CAN_L, CAN_H) for a bus (40) of the bus system (1) in response to the two different values ​​of a digital transmit signal (TxD) are designed such that the transmit module (121; 121_0) in its first operating mode (SLOW;SIC) generates a first or second bus state (401, 402) on the bus (40) and in its second operating mode (FAST_TX) generates a third or fourth bus state (L0, L1), wherein the bus signals (CAN_L, CAN_H) on the bus (40) form a differential voltage (VDIFF) whose voltage value is different for the first to fourth bus states (401, 402, L0, L1).